Adding github actions 'verify' workflow.

.github/workflows/verify.yml

@@ -0,0 +1,26 @@
+name: Java CI with Maven
+
+on:
+  push:
+    branches: [ '**' ]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java-version: ['11', '17']
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up JDK ${{ matrix.java-version }}
+        uses: actions/setup-java@v2
+        with:
+          java-version: ${{ matrix.java-version }}
+          distribution: 'zulu'
+      - name: Cache Maven packages
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
+      - name: Build with Maven
+        run: mvn -B verify --file pom.xml